JP2009250267A - Film check valve and balloon structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film check valve which requires no straw when filling air into a balloon structure. <P>SOLUTION: The film check valve is provided with a cylindrical valve body 6a made of a flexible film and an air inlet 8, which is provided integrally and protrusively with a film at the rear end portion of the valve body 6a and which is formed large enough for a mouth of a human to be enabled to contact inside the rear end opening by enlarging the size of the opening of the rear end portion. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  According to the present invention, a sealed bag-shaped balloon body made of a flexible film body and a valve body formed by joining two flexible sheets to each other are penetrated through the balloon body film body. The present invention relates to a balloon structure having a film check valve.

Traditionally, balloons with illustrations and photographs on the surface are used for character promotion at events and the like. Such a balloon is a structure (hereinafter referred to as a balloon structure) having a hermetically sealed bag-shaped balloon body made of a flexible film body and a film check valve provided on a part of the balloon body. .)It has become.
FIG. 8 is a front view showing an example of a conventional balloon structure. The balloon structure 1 includes an airtight and bag-shaped balloon body 2 made of a flexible film body, and a film check valve 3 provided on the balloon body 2. By enclosing air from the film check valve 3 into the balloon body 2, a three-dimensional balloon shape as shown in the figure is formed. The film check valve 3 includes a valve body 6a formed by joining two flexible sheets together. The illustrated example is a balloon structure 1 for character promotion having a relatively flat head 4 and bottom 5.

In the conventional balloon structure 1 of FIG. 8, in order to enclose air into the balloon main body 2 through the film check valve 3, first, a cylindrical, relatively hard straw T is prepared, and the straw T is attached to the balloon main body 2. Is inserted into the valve body 6a from the outside. Next, by attaching a mouth to the rear end of the straw T and blowing air, the balloon body 2 becomes the intended three-dimensional balloon shape.
Next, when the straw T is pulled out from the valve body 6 a after the air is blown in, the portion of the valve body 2 extending inside the balloon body 2 is crushed by the pressure in the balloon body 2. As a result, the two flexible sheets are in close contact with each other, so that the air blown into the balloon body 2 is prevented from leaking outside through the valve body 6a.

  However, the film check valve 3 constituting the conventional balloon structure 1 must be provided with a straw T when enclosing air. Therefore, the troubles such as storage and handling of the straw T are unavoidable, and the improvement has been demanded. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a film check valve and a balloon structure that can easily blow air without using a straw T.

The present invention described in claim 1 is a cylindrical valve body 6a made of a flexible film, and is projected integrally with the film at the rear end of the valve body 6a, and the diameter of the rear end portion is reduced. The film check valve is provided with an air blowing port 8 which is enlarged and formed large enough to allow a human mouth to come into contact with the rear end opening.
The present invention described in claim 2 is a film check valve according to claim 1, wherein the air blowing port 8 has a tapered portion 9 whose diameter increases in a tapered shape toward the rear end. is there.

According to a third aspect of the present invention, in the first or second aspect, the air blowing port 8 separates the two flexible sheets forming the valve main body 6a from each other and draws air from between them. The film check valve is characterized in that a sheet unbonded portion 12 for blowing is provided.
According to a fourth aspect of the present invention, in any one of the first to third aspects, the valve body 6a is formed by joining two rectangular flexible sheets to each other, and the rear of the valve body 6a. A film check valve characterized by being joined so that the diameter of the end portion is enlarged.

According to a fifth aspect of the present invention, there is provided the film check according to any one of the first to fourth aspects, wherein the valve body 6a is provided with a backflow prevention portion 10 having a reduced diameter. It is a valve.
A sixth aspect of the present invention is a film check valve according to any one of the first to fifth aspects, wherein the anti-welding agent 11 is applied to the inner surface of the valve body 6a.
The present invention described in claim 7 is a hermetically sealed bag-shaped balloon body 2 made of a flexible film body, and penetrating the balloon body. A balloon structure comprising a film check valve.

  The film check valve according to the present invention includes a cylindrical valve body 6a made of a flexible film and a film projecting integrally at the rear end portion of the valve body 6a. The rear end portion has an enlarged diameter, and the rear end opening is provided with an air blowing port 8 formed large enough to allow a human mouth to come into contact therewith. By providing the air blowing port 8 having an enlarged diameter as described above, air can be blown directly into the air blowing port, so that the straw used in the conventional film check valve is used. There is no need to prepare.

In the above-mentioned film check valve, as described in claim 2, the air blowing port can be provided with a tapered portion whose diameter increases in a tapered shape toward the rear end. By providing such a tapered portion, an enlarged portion to which a mouth is attached can be easily formed.
In any one of the above-described film check valves, as described in claim 3, the two flexible sheets forming the valve body are separated from each other and air is blown into the air blowing port. The sheet unbonded portion can be provided. When such a separation portion is provided, the air blowing port 8 can be easily widened. Furthermore, air can be blown easily without enlarging the air blowing port so much.

Furthermore, in any one of the above-described film check valves, as described in claim 4, two rectangular flexible sheets are joined together to form the valve body, and at that time, on the outside of the balloon body It can join so that the diameter of the rear-end part of the valve body which protrudes may expand. If comprised in this way, since the valve main body which has the part which the diameter expanded by the flexible sheet | seat cut | disconnected squarely can be formed, many valve main bodies can be made without waste from a flexible sheet of a large area.
Further, in any one of the above-described film check valves, as described in claim 5, a backflow prevention portion having a narrowed diameter can be formed inside the valve body. If such a backflow prevention part is formed, when air is enclosed in the balloon body or the like, the possibility that a part of the air flows back can be reduced.

Furthermore, in any one of the above-described film check valves, as described in claim 6, a welding inhibitor can be applied to the inner surface of the valve body. When the anti-welding agent is applied in this way, when the valve body is welded to the balloon body in the process of manufacturing the balloon structure, the two flexible sheets are welded together and closed by the heat of welding. Can be prevented.
Next, the balloon structure of the present invention is a hermetically sealed bag-shaped balloon body 2 made of a flexible film body, and penetrates the balloon body. This is equipped with a film check valve. By comprising in this way, it is not necessary to prepare the straw used for the conventional balloon structure.

Next, the best embodiment of the present invention will be described based on the drawings. FIG. 1 is a front view showing an example of a balloon structure having a film check valve 6 of the present invention. The balloon structure 1 includes a balloon body 2 and a film check valve 6. That is, the balloon body 2 includes a sealed bag-shaped balloon body 2 made of a flexible film body and a valve body 6a formed by joining two elongated flexible sheets together. And a film check valve 6 penetrating the film body.
As the flexible film forming the balloon body 2, for example, a flexible plastic sheet such as vinyl chloride, polyethylene, or polystyrene can be used. As the flexible sheet forming the valve body 6a, a similar flexible plastic sheet such as vinyl chloride, polyethylene, or polystyrene can be used.

FIG. 2 is a partially enlarged sectional view of the film check valve 6 shown in FIG. The valve main body 6a constituting the film check valve 6 is fixed to the balloon main body 2 by welding at its penetrating portion, and an air blower having an enlarged diameter at the rear end portion of the valve main body 6a protruding outside the balloon main body 2. A slot 8 is provided. The air blowing port 8 is formed by a tapered portion 9 whose diameter increases in a tapered shape toward the rear end of the valve body 6a. The two elongated flexible sheets are formed by welding the edges of each other.
The portion of the valve body 6a that protrudes to the inside of the balloon body 2 is formed with a cylindrical backflow prevention portion 10 having a tapered aperture. The backflow prevention unit 10 is made of the same material as that of the valve body 6a, and is fixed to the inside of the valve body 6a by welding or adhesion. Further, an anti-welding agent 11 is applied to the inner surface of the valve body 6a penetrating the balloon body 2 as an example in a cross shape.

  Next, a method for blowing air into the balloon body 2 of the balloon structure 1 will be described. FIG. 3 is a perspective view showing a state where air is blown into the film check valve 6 using the air blowing portion 8. In blowing air, first, the air blowing port 8 is widened with both hands, and then a person's mouth is put in the opening of the widened portion, and air is blown into the valve body 6a. Since the valve body 6a portion connected to the air blowing port 8 is formed by overlapping two flexible sheets, the two flexible sheets are always overlapped to be flat as a whole. However, when air is blown in, the flat valve body 6a is deformed into a circular shape by the pressure of the air, so that air can flow through the valve body 6a.

FIG. 4 is a view showing a state where air is blown into the balloon body 2 by the method shown in FIG. FIG. 4 is a sectional view taken along the line IV-IV of the part of the film check valve 6 shown in FIG. 3, and the arrows indicate the air flow direction.
FIG. 5 is an enlarged view showing another example of the film check valve 6 according to FIG. 5 is different from the example of FIG. 2 in the structure of the air blowing port 8, and the others are configured in the same manner. Therefore, the same parts as those in FIG.

The film check valve 6 shown in FIG. 5 has a taper portion 9 in which the air blowing port 8 is tapered toward the rear end of the valve body 6a, and two flexible sheets forming the valve body 6a. The sheet is constituted by a sheet unbonded portion 12 that is separated from each other, and the sheet unbonded portion 12 extends from the rear end of the tapered portion 9.
In order to blow air into the balloon body 2 from the air blowing port 8 of FIG. 5, first, spread the two flexible sheets of the sheet unbonded portion 12 with both hands, and attach a person's mouth while spreading the sheets. Just blow in air. If the air blowing port 8 is configured in this way, the air blowing port 8 can be easily widened as described above.

FIG. 6 is an enlarged view showing still another example of the film check valve 6 according to FIG. 6 differs from the example of FIG. 2 in the structure of the valve body 6a, and the rest is configured similarly. Therefore, the same parts as those in FIG.
The valve body 6a in FIG. 6 is formed by joining two rectangular flexible sheets together. In the joining, joining is performed so that the diameter of the rear end portion of the valve body 6a protruding outside the balloon body 2 is enlarged. That is, as shown in FIG. 6, a wide sheet joint 13 is formed from the inside of the balloon body 2 to the middle of the valve body 2 so as to form a small-diameter portion that forms an air flow passage, and air blowing is performed. The portion that forms the opening 8 forms a tapered portion 9 and forms a sheet joint portion 14 that gradually becomes narrower so that the diameter (the diameter of the air flow passage) is enlarged. The air blowing port 8 formed as shown in FIG. 6 can also blow air by substantially the same operation as the air blowing port 8 shown in FIG.

  Next, FIG. 7 is a modified example of FIG. 6 and is different from FIG. 6 in that the welded portions are only the edge portions. At the same time, the backflow prevention part 10 is formed in a step shape asymmetrically in the vertical direction to enhance the backflow prevention effect, and further, the sheet unjoined part 12 is provided at the rear end part.

  The film check valve and the balloon structure of the present invention can be used as a balloon structure used for character advertisements and the like.

The front view which shows an example of the balloon structure which has the film check valve 6 of this invention. The expanded sectional view of the part of the film check valve 6 shown in FIG. The perspective view which shows the state which is blowing in air into the film check valve 6 shown in FIG. FIG. 4 is a cross-sectional view showing a state in which air is blown into the balloon body 2 through the film check valve 6 as shown in FIG. 3.

The expanded sectional view which shows the other example of the film check valve 6 of this invention according to FIG. The expanded sectional view which shows other example of the film check valve 6 of this invention according to FIG. The expanded sectional view which shows other example of the film check valve 6 of this invention according to FIG. The front view which shows the conventional balloon structure with a film check valve 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Balloon structure 2 Balloon body 3 Film check valve 4 Head 5 Bottom surface 6 Film check valve 6a Valve body

8 Air Blowing Port 9 Tapered Portion 10 Backflow Preventing Portion 11 Adhesion Preventing Agent 12 Sheet Unbonded Portion 13, 14 Sheet Bonding Portion T Straw

Claims (7)

  A tubular valve body 6a made of a flexible film and a film projecting integrally from the rear end of the valve body 6a with a film, the diameter of the rear end portion being enlarged, and a person in the rear end opening A film check valve, characterized in that it is provided with an air blowing port 8 formed so as to be able to contact the other port.   The film check valve according to claim 1, wherein the air blowing port (8) has a tapered portion (9) whose diameter increases in a tapered shape toward the rear end.   3. The air blowing port 8 according to claim 1 or 2, wherein the air blowing port 8 is provided with a sheet unjoined portion 12 for separating the two flexible sheets forming the valve body 6a from each other and blowing air therebetween. A film check valve characterized by the above.   4. The valve body 6a according to any one of claims 1 to 3, wherein the valve body 6a is formed by joining two rectangular flexible sheets together so that the diameter of the rear end portion of the valve body 6a is enlarged. A film check valve characterized by being configured as described above.   The film check valve according to any one of claims 1 to 4, wherein a backflow prevention portion 10 having a reduced diameter is formed inside the valve body 6a.   6. The film check valve according to claim 1, wherein an anti-adhesive agent 11 is applied to the inner surface of the valve body 6a. A sealed bag-shaped balloon body 2 made of a flexible film body and the film check valve according to any one of claims 1 to 6 penetrating through the balloon body 2. Characteristic balloon structure.

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